Hickok Seat Belt ID

I have a pair of Hickok seat belts that are identical to the belts installed by US dealers in the Jaguar E-types in the mid 60’s except they do not have the Jaguar wings logo stamped into the buckle. The labels on the belts read : American Safety Equipment Corporation 40-200 SAE-J4C 1966-2. Clearly not from an E-type, but is there an expert out there who can tell from the label what vehicle the belts would have been originally installed in?
Tom 1967 Coupe